Broccoli Lines Tolerant to Hollow Split Stem Disorder
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Solution Overview
Problem
Current broccoli breeding techniques have not successfully developed lines that combine high yield and quality with substantial tolerance to hollow/split stem disorder, which affects many commercial varieties, especially under climatic conditions that promote rapid growth.
Innovation Solution
Development of broccoli lines and varieties, such as BRM53-3915, BRM53-3916, and hybrid RX05951180, which exhibit genetic tolerance to hollow/split stem disorder, along with desirable traits like high yield and quality, through specific breeding and genetic methods, including microspore culture and recurrent selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional broccoli breeding techniques are used to develop high yield and quality varieties, then yield and quality are improved, but tolerance to hollow/split stem disorder deteriorates
Solution Approach 1:
The patent applies parameter changes by modifying the genetic composition parameters of broccoli varieties through controlled crossing programs. Specific genetic traits for hollow stem tolerance are introduced and combined with high yield and quality traits, changing the genetic parameter set to achieve both improved productivity and reliability simultaneously
2Speed
If broccoli varieties are bred for rapid growth under favorable climatic conditions, then growth rate and yield are improved, but incidence of hollow/split stem disorder increases
Solution Approach 1:
The patent applies preliminary anti-action by pre-introducing genetic tolerance traits to hollow/split stem disorder into broccoli varieties before they are exposed to rapid growth conditions. The breeding program systematically combines tolerance genetics with growth-promoting traits, so that when plants grow rapidly under favorable conditions, the tolerance trait is already in place to prevent the harmful disorder from developing
Data Source
AI summary
The invention provides broccoli seed and plants that combine high yield and quality with tolerance to hollow/split stem disorder. The invention further provides seed and plants of the broccoli lines designated BRM53-3915 and BRM53-3916 and progeny produced with at least one of these plants as a parent. The invention also relates to the plants, seeds and tissue cultures of hybrid broccoli variety RX05951180.